A method for predicting aerodynamic noise in a train and a train

Abstract

The invention discloses a method for predicting aerodynamic noise inside a train, which comprises the steps of dividing the body surface of the train into blocks to obtain a block body model; performing aerodynamic calculation based on the block body model to obtain the body surface Pulsating pressure; calculate the vibration and acoustic radiation of the vehicle body structure under the pulsating pressure on the surface of the vehicle body, and obtain the medium and low frequency aerodynamic noise and the medium and high frequency aerodynamic noise respectively; perform frequency domain merging on the medium and low frequency aerodynamic noise and the medium and high frequency aerodynamic noise , to obtain the full frequency domain aerodynamic noise. This method effectively solves the prediction problem of high-speed train interior aerodynamic noise, and then obtains the characteristics of high-speed train interior aerodynamic noise in all frequencies. The invention also discloses a train and a computer-readable storage medium, both of which have the above beneficial effects.

Description

technical field [0001] The invention relates to the technical field of rail transit vehicles, in particular to a method for predicting aerodynamic noise inside a train, and also to a train and a computer-readable storage medium. Background technique [0002] With the development of science and technology, the speed of the train is also increasing, and the interaction between the train and the air is becoming more and more significant. When the train is running, the surface of the car body will generate a large pulsating pressure, which will generate aerodynamic noise inside the train, thereby affecting the comfort of passengers. When the train speed reaches 300km / h, aerodynamic noise will become the main source of high-speed train noise, and excessive noise usually becomes the key problem restricting the speed of trains. Accurately predicting and understanding the aerodynamic noise characteristics of high-speed trains is the basis and key to the noise reduction design of hi...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a method for predicting aerodynamic noise inside a train, which can effectively solve the problem of prediction of aerodynamic noise inside a high-speed train, improve calculation accuracy, and further obtain the characteristics of aerodynamic noise inside a high-speed train at all frequencies; Another object of the present invention is to provide a train and a computer-readable storage medium, both of which have the above-mentioned beneficial effects

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